Force filler for grease cups



W. H. DUE-RE FORCE FILLER FOR GREASE CUPS Filed March 30 1920 INVENTOR WITNESSES /i w 30 5 6 69%2 To all whom it may com em:

I Patented Jan. 12, 1926 PATENT OFFICE.

WILLIAM HENRY nurse, or vrcxss'une, mrssrssrrrr.

. roncn FILLER r012. GREASE curs.

Application filed. larch 30, 1920. Serial No. 369,989.

Be it known that I, WILLIAM H. Duran,

a citizen of the United States, residing at Vicksburg, -imthewounty of -Warren and State of hfississiplgpi, have invented'a new and useful Force iller for Grease Cups, of

- which the following is a specification. v

The present invention relates to. grease us or force'fillers' especially a'dapted to 11 grease, cups with lubricants. I

An object of the invention is to provide a novel means for feeding the lubricant to I the nozzle or discharge end of a grease gun.

A further object is to provide a force filler having means for forming a tight joint with a grease cup when applied" thereto,

whereby lubricant will pass from the filler to the cup Without any waste thereof.

A s ecific object of the invention is to provi e a force filler orgrease gun especially'designed to feed grease to that type of v grease cup described and claimed in m application filed of even date herewith, erial No. 369,940. In that application a grease cup is described-having a valve in its head, which valve yields when the grease is forced from the grease gun of the present invention into the head of the cup, but when the pressure is relieved returns to its initial position closing the rease cup.

,The invention wi 1 'be best understood from a consideration of the following de-' tailed description taken in connection with the accompanying drawing forming part ofthis specification, with the understanding,

however, that the invention is not confined to anystrict conformity with the showin in the drawing, but maybe changed an modified so long as such changes and modifications ma'rkno material departure from the salient features of the invention as expressed in the appended claims.

In the drawing wherein is shown for illustrative purposes a preferred embodiment of the invention, 7 g 1 Fig. 1 is an elevation of a force filler embodying the presentinventionshown in r position to, fill one of my improved grease on s. v

ig. 2 is a longitudinal diametric section of the barrel portion of the ease gun.

Fig. 3 is'a face view oft edisk of the grease gun. I Y I 'Fig. 4 is a-detail with parts in cross sec the flow of grease through the tion showing the construction of the nozzle of the grease gun.

F ig. 5 is an elevation of the inner face of the hook. r

The numeral 10 in the drawing indicates generally the improved grease cup of my copending application and 11 the grease gun of the present invention. This grease gun ineludes a cylindrical barrel 12 which receives telescopically a complementary plunger barrel 12". A- nozzle or spout 13 is provided at the end of the barrel 12 remote from that end which receives the plunger 12. This spout is curved appropriately so that the outer or discharge end thereof presents the passageway 26 therein transversely of the main bod of the grease gun. A cut-ofi' valve 14 is provided in the spout so that assageway 26 may be stopped when desired Formed preferably integrally with the nozzle 13 is an arm 15 extending in a direction substantially longitudinal with respect to the grease gun and pivotally supporting at its outer end a hook 16. Such hook ma embrace the arm with bifurcations l8 an convenient means, such as a pin may rovide the pivot of said hook. The ree on of the hook is bentapproximately at right angles and such bent end is again bent as indicated ably mounted on said head. The nut 19- carries at an intermediate point an inwardly-directed annular web or flange 21- which, when the nut is in place upon the head, fits snugl against the free outer end of-the head. his web or flange is spaced from the outerend of the nut 19, thus providing a rim19. Y

A washer'22 is rece1ved within a chamber 25 provided at the outer end of-the head 20, such chamber being shaped preferably likeasegment of a sphere. The washer has 1 a centre passageway 24 in alinement with .the passageway 26. An annular shoulder 23 is provided on the washer to engage with the flange 21. This washer exten s outwardly from thehead .20 as far as does the nut 19 and forms with the rim 199 an annular space into which lugs provided on the grease cup will fit. y

The washer 22 has a wall shaped like a segment of a sphere in order to fit within the chamber 25; but the thickness of the washer within the annular flange 21 is less than the depth of the chamber 25, so that a space ordinarily exists between the washer and the end of the passageway .26. This is clearly shown in Fig. 4. The washer is of any flexible material and is designed to yield inwardly and occupy the upper portion. of the chamber 25 when the grease gun is seated firmly upon a grease cup. The purpose of the spherical wall of the chamber and the spherical side of the washer is to permit limited rocking of the washer within its chamber so that variations in the angle of the grease gun with respect to the grease cup will not prevent making a tight joint between the two.

The nozzle 13 is preferably integral with a head or collar 27 which may be secured in any desirable wa to or even be integral with the barrel 12;. T is head 27 has a concentric boss 28 internally screw threaded, as shown.

'A stem 29 having a passageway 31 longitudinally thereof is screwed into the boss 28- and has an annular shoulder 30 fitting on the outer end of the boss. Such a stem p r0- vides a grease conduit. This stem 29 carries a disk 32 upon the other end beyond the open end of the barrel 12, which disk cooperates with the plunger barrel 12 when the latter is turned to force grease through the aline'd passageways 31 and 26.

The disk 32 has a rim 33- which is screw threaded peripherally to engage with internal screw threads 34 of the plunger 12. The disk carries on its outer face integral lugs or projections 36, seen best in Fig. 3, which are spaced from each other and surround the end of the passageway 31. The function of these lugs 36 is to provide means by which a wrench may tighten or loosen the stem 29 with respect to the boss 28 which holds it within the rease gun.

The outer end 0 the plunger barrel 12 is closed by a wall 35 and preferabl a raised and milled edge 37 see Fig. 1 equivalent is provide to make easy. the turning .of the plunger barrel 12" upon the stationary disk 32. The threads provided on the disk 32 and on the stem 29-are so arranged that the turning of the plunger inwardly against the resistance of the grease only tends to tighten the hold of the stem 29.

The plunger barrel 12, besides acting to force the lubricant out of the grease gun,

provides a convenient means by whichthe amount of grease fed, as well as the. amount of grease contained in the instrument, may be ascertained. A peripheral scale 38 is marked upon the barrel 12, such scaleenjoint between the nozzle and the or the abling the operator to turn the plunger an; fractlon of a revolution that may be esire' A longitudinal scale 39 isalso provided on 1 marked on the outer face of the barrel 12 so that portions of a revolution of the plunger ma be read with accuracy upon the scale'38. It will be clear that if one desires tov force a certain quantity of grease out through the the plunger Y nozzle end, it will only be necessary to'bring the grease up to the nozzle, take a reading with the aid of the two scales, and then turn the plunger barrel until the desired quantity of grease has been forced out. The scales mayread in cubic centimeters ,or in any other convenient volumetric unit. If one should desire to measure accurately the amount of grease contained in the grease gun, the valve 14. will be closed, thus preventing grease'from moving out of the gun, and the plunger will be screwed into the barrel until it meets with that resistance which experience teaches indicates compression of the grease; then a reading will be taken by the aid of the two scales, which will give the exact quantit of grease in the barrel and nozzle up to t e valve.

When the instrument is applied to a application referred to, the hook 1 is engaged under the head of the greasecup and the barrel is grasped by-the hand to form a lever with the hook end 17 acting as the fulcrum. The pressure laced upon the barrel will be applied by t e outer face of the washer 22 upon the top of the grease cup. Obviously, the distance between the pivot point at 17 and the point of pressure at 22 is so much less than the length of the lever (for in this case the grease gun acts as a lever), that a relatively small pressure u on the barrel is sufficient to effect avery tight grease cup. This great pressure which may be placed upon te'washer will cause the same to move inwardly somewhat, the chamber 25 permitting such movement. When the grease gun is so seated upon the grease cup, it will be impossible for any grease to escape from the of the lubricantw en the force filler is not in rest. In hot weather, grease guns will frequently drip grease from the nozzle end;

but in the present device-this The construction specifically shown in Figure 2 of the drawings embodying a cupshaped barrel, a grease conduit supported 1n the barrel, a disc secured to one end of the conduit, theother end communicating with the nozzle of the device, a cylindrical plunger slidably fitting into the barrel and screw-threaded on its interior, said plunger engaging with threads on the periphery-of the disc and having a closed outer end, is specifically claimed in my companion application, file'd October 10th, 1921, Serial No. 506,864.

lVhat is claimed is:

1. In a force filler for grease cups, a nozzle, and means for feeding lubricant to the nozzle, said nozzle having means for seating itself upon a grease cup to be filled, said nozzle and said feeding means being movable as a unit, and other means on the nozzle for engaging with the grease cup independently of and belowthe said seating means, the said means for seating thesaid other means being arranged at opposite sides of the extremity of the nozzle, whereby downward pressure upon the feeding means acting through the. said other means will effect a tight joint between the nozzle and the grease cup.

2. Ina force filler for grease cups, a nozzle, and means for feeding lubricant to the nozzle, said means being in substantially rigid relation with the nozzle, said nozzle having means whereby it may be seated upon the grease cup, and additional means for engaging with the latter, said additional means extending beyond the end of the nozzle, whereby the force filler may be used as a lever acting through the point of engagement of said additional means with the grease cup to effect a tight joint between the nozzle, and the grease cup.

3. In a force filler for grease cups, a nozzle, and means for feeding lubricant to the nozzle, said means being in substantially rigid relation with the nozzle, said nozzle having means whereby it may be seated upon a grease cup, and a hook for-engagement with the latter when seated thereon, said hook being located be 0nd the end-of the joint-between the. nozzle and the grease cup.

4. In a force filler for grease cups, a

grease gun including a barrel and a nozzle whereby it may be seated upon a grease cup' in substantially rigid relation therewith, said nozzle having seating means at its outer end to be filled, and a hook connected to the noz zle at the side opposite to the barrel, said hook engaging with the grease cup beneath the said seating means to hold the grease cup in seating engagement with the nozzle, whereby downward pressure upon the barrel acting through said hook will effect a tight joint between the nozzle and the grease cup.

5. In a force filler for grease cups, a nozzle, and means for feeding lubricant to the nozzle, said nozzle having seating means for seating itself upon a grease cup to be filled, said means comprising a yieldable element movably held at the outer end of the nozzle to permit limited movement inwardly when the nozzle is seated, said nozzle and feeding means being movable as a unit, and other means on the nozzle for engaging with the grease cup independently of and below the said seating means and at that side of the grease cup remote from the feeding means, whereby .pressure upon the feeding means acting through the said other means will effect a tight joint between the nozzle and the grease on 6. In a force fil er for grease cups, a nozzle, and means for forcing lubricant out of the nozzle, said means being in substantially rigid relationwith the nozzle, said nozzle having an enlarged head at its outer end and a nut removably mounted on said head, said head having a chamber communicating with the passage of the nozzle, means held in the chamber for effecting a ti ht joint with the grease cup when the filler nozzle is seated thereon, means formed integrally with the nut for holding the tight joint making means from outward movement with respect to the nozzle, and means on the nozzle for engaging with the grease cup to hold it seated, whereby pressure upon the forcing means will effect a tight joint between the nozzle and the grease cu 7. In a force fill r for grease cups, a nozzle, and means for forcing lubricant out of the nozzle, said means being in substantial- 1y rigid relation with the-nozzle, said nozzle having an enlarged head, a chamber provided insaid head in communication with the passageway of the nozzle, said chamber being of relatively large diameter with respect to'the diameter of the passa eway, a washer received within the cham r and movable therein, said washer having a passageway alining with the passageway of the nozzle, said nozzle including removable means mounted on the head for holding the washerin place, and means on the nozzle for engaging with the grease cup to hold it sentcd on the nozzle, whereby pressure upon the forcing means will effect a tight joint between the nozzle and the grease cup.

8. In a force filler for grease cups, a nozzle, and means for forcing lubricant out of the nozzle, said means being in substantially rigid relation with the nozzle, said nozzle having an enlarged head and a nut removably mounted on said head, said nut having an annular inturned web, a washer of flexible material held within the head by said web, said head havin a chamber with rounded walls for permitting limited roeking of said washer within the same, and means on the nozzle engaging with the bottom of the grease cup to hold it seated in connection with the nozzle, whereby downward pressure upon the forcing means will effect a tight joint between the nozzle and the grease cup.

9. In aforce filler for grease cups, a nozzle, and means for feeding lubricant to the nozzle, said means being in substantially rigid relation with the nozzle,aeut-otf valve in the nozzle, an arm integral with the nozzl'e, a hook pivotally mounted on the outer end of the arm, said hook being shaped to engage with the head of a grease "cup, the free end of the nozzle being shaped to be seated upon the upper end of the grease cup to effect a tight joint therewith, whereby the force filler may he used as a lever acting through the poin't'of engagement of the hook with the ease cup to insure a tight joint between tfifa nozzle and the grease cup.

10. The combination with a nozzle having an enlarged head and a chamber provided in said head and partially spherical, of a washer seated within the chamber and also movable means mounted on the head for holding the washer in place, and meansfor feeding lubricant to the nozzle, said means bein in substantially rigid relation with the nozz e and other means for enga ement with the grease cup'whereby a tight oint is effected between the nozzle and the grease cup when the force filler is pressed toward the nozzle.

11. Incombination with a nozzle having an enlarged head, a chamber provided in said head and partially spherical, a flexible washer seated within the chamber and also partially spherical, the thickness of the washer being less than the de th of the chamber so as to leave a space etween the washer and the upper wall of the chamber, said washer having a passageway in alinement with the passageway of the nozzle.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature.

WILLIAM HENRY DUPRE. v 

